This paper suggests an
international benchmarking method of disembodied knowledge flow structure.
Using patent citation as a proxy measure of disembodied knowledge flow,
national knowledge network is developed. Structural equivalence measure is
applied to comparing the knowledge network of Korea and Taiwan with that of
USA. Static and dynamic comparison make it possible to benchmark disembodied
knowledge flow structure efficiently and identify convergent and divergent industries between
developing countries and USA. It is also a meso-study that could be conducive
to building a comprehensive analytical framework of national innovation system.
Authors:S. Y. Cho, J. Y. Lee, H. J. Khu, J. H. Kang, M. Y. Yoon, and J. C. Kim
Accelerator mass spectrometry (AMS) is the most sensitive, safe and precise analytical method for quantifying long-lived isotope in biomedical research with animals as well as human beings. In Korea, AMS Laboratory has been operating successfully for years measuring especially archeological samples for 14C dating. In this year, a biological sample pretreatment facility was setup and we have also started to work on biomedical applications. As a preliminary study, we have measured the natural background levels of 14C in tissues and blood of humans and rats. The results were agreed with the other reported levels and gave stable and reproducible results within 1-2%.
Authors:Yong Chung, Jong Moon, Young Chung, Seung Cho, and Sang Kang
The aim of this research was to enhance the use of nuclear analytical techniques for air pollution studies and to study the
feasibility of the use of instrumental neutron activation analysis (INAA) as a routine monitoring tool to reveal environmental
pollution sources. For the collection of air particulate samples, the Gent stacked filter unit, low volume sampler with Nucleopore
membrane filters were used. Trace elements in samples collected at two suburban residential sites, Taejon and Wonju city in
the Republic of Korea, were analyzed by INAA. Variations of the elemental concentrations were measured monthly and the enrichment
factors were calculated for the fine (<2 μm EAD) and coarse size (2–10 μm EAD) fractions. The analytical data were treated
statistically to estimate the relationship between the two variables, the concentrations of elements and the total suspended
particulate matter. The results were used to describe the emission source and their correlation.
Authors:K. Lee, Y. Yoon, S. Cho, K. Ko, and Y. Kim
Naturally occurring radionuclides (NORN) such as 40K, 226Ra and 232Th from 44 surface sediment samples collected from four desert regions of Chinese were determined to investigate the regional
characteristics of the source areas of Asian dust. The radionuclides for 41 surface sediment samples collected from seven
sites of the Keum River area in Korea were also determined to compare the regional characteristics with the Chinese desert
area. The specific activities (SA) and the specific activity ratios (SAR) of the radionuclides were investigated for distinguishing
the source region of Asian dust. The SA of 226Ra and 232Th as well as the SAR of 226Ra/40K and 232Th/40K were found to be useful to characterize source area and tracing Asian dust.
The complexation of Eu3+ and Am3+ ions with the humic acids has been investigated at various pH (4.0, 4.5, 5.0, 5.4) in 0.1M NaClO4 solution using solvent extraction technique. Two humic acids are used in this study: humic acid extracted from the soil of Taejon on the Okchon Basin of Korea (TJHA) and commercially available one from Aldrich Chemical Co. (AHA). The total carboxylate group concentrations were determined to be 3.58 meq/g and 4.59 meq/g for Taejon and Aldrich humic acids, respectively. The conditional stability constants (log
1 and log
2), dependent on the pH of the solution, of the complexes of Eu3+ and Am3+ ions with the humic acids have been determined at the ionic medium of 0.1M NaClO4. The values of stability constants with the degree of ionization of TJHA for Eu and Am complexes are quite well agreed with those of Lake Bradford humic acid (LBHA), indicating that structural characteristics of TJHA and LBHA may be quite similar to one another.
Authors:DongIll Kim, Deokjong Lee, Junghan Lee, Kee Namkoong, and Young-Chul Jung
. Participants were administered Structured Clinical Interview for the DSM, Fourth Edition and Korean Wechsler Adult Intelligence Scale, Fourth Edition by a clinical research psychologist to exclude those who met criteria for a lifetime Axis I psychiatric
The stability constants of Eu3+ and Am3+ with the site specific humic acid (YKHA) have been determined. The humic acid has been extracted from the soil of Yongkwang
area belonging geologically to the Okchon Basin of the Korean Peninsula, where the nuclear power plant is located. The total
carboxylate capacity, the acidity constant (pKa), and the binding constants with Eu3+ and Am3+ have been determined for humic acid.
Because R&D conducted in electronics and chemistry has made significant contributions to South Korean economic development,
past strategies in technology developments in these fields are addressed. The possibility of capturing national technology
strategy and policy characteristics from patent analyses is explored. For the analysis, data were analyzed from 557 US patents
in electronics and 108 US patents in chemistry, registered by Korean inventors, between 1989 and 1992. Descriptive statistics
of aggregated patent information were equivalently mapped to each strategy in the two fields. Industry-specific features and
past technology strategies in electronics and chemistry are identified. Electronics was driven by the private sector, while
chemistry was driven by the public sector. Inventors in both fields are seeking clustered innovation on which subsequent innovation
can be accumulated and/or applied to numerous heterogeneous fields. Contrary to the stated assumption, many Korean electronic
innovations were based on scientific outputs such as papers. Of the knowledge strategy variables, size of invention and number
of heterogeneous classifications are considered to be an important factor that affects patent citation counts in both fields.
Authors:Yeong Seon Jo, Soo Young Bhang, Jung-Seok Choi, Hae Kook Lee, Seung Yup Lee, and Yong-Sil Kweon
Internet, gaming, and smartphone addiction in children and adolescents, and identify risks and protective factors. It was conducted from August 2015 to August 2019 in Seoul and Gyeonggi-do, Korea and included 194 participants ( Jo et al., 2019 ). Children
Authors:Yong-Sam Chung, Sun-Ha Kim, Jong-Hwa Moon, Young-Jin Kim, Jong-Myoung Lim, and Jin-Hong Lee
For the identification of air pollution sources, about 500 airborne particulate matter (PM2.5and PM10) samples were collected by using a Gent air sampler and a polycarbonate filter in an urban region in the middle of Korea
from 2000 to 2003. The concentrations of 25 elements in the samples were measured by using instrumental neutron activation
analysis (INAA). Receptor modeling was performed on the air monitoring data by using the positive matrix factorization (PMF2)
method. According to this analysis, the existence of 6 to 10PMF factors, such as metal-alloy, oil combustion, diesel exhaust,
coal combustion, gasoline exhaust, incinerator, Cu-smelter, biomass burning, sea-salt, and soil dust were identified.